Azoo has 19 more species of fish than birds. there are 152 species of fish at the zoo. how many species of birds does the zoo have/ could the equation be b-19=152.

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.